Source
chown www-data:www-data -R * # Let Apache be owner
find . -type d -exec chmod 755 {} \; # Change directory permissions rwxr-xr-x
The above command will say you days
Finds all the directories and sets them as:
read,write,exec by user
read,exec by group and anon
find . -type f -exec chmod 644 {} \; # Change file permissions rw-r–r–
above command finds all the files and sets them to:
read,write by user
read only by group and anon